McLeod RXT Twin Disc Clutch Kit 12-17 Challenger 1-1/8 x 26 Spline 0 BAL w/130T 8 Bolt AL Flywheel
If your manual Dodge Challenger R/T or 392 now makes far more power than the factory clutch was built for, and it slips in third or fourth at full throttle, this is the kind of kit owners look for. McLeod part 6344907M is an RXT twin disc clutch packaged with a dedicated billet aluminum flywheel for 2012-2017 Challengers with the 5.7L or 6.4L HEMI and the Tremec TR-6060 six-speed. It uses a 1-1/8 x 26 spline, a 130-tooth ring gear, 0 balance and the 8-bolt crank pattern, so it bolts in as one unit instead of a clutch from one catalog and a flywheel from another.
A single disc clutch holds torque by squeezing one friction disc between the flywheel and pressure plate. The RXT splits that job across two ceramic-lined discs with a floater plate between them, which roughly doubles the friction surface without needing a heavier pedal. McLeod rates the RXT around 1000 horsepower and describes the pedal as close to stock, with smooth enough engagement for street driving between drag strip passes. The aluminum flywheel cuts rotating weight, so the engine revs up faster between shifts; the trade-off is a little less inertia when pulling away from a stop, so expect to feather the throttle more on takeoff than with the factory flywheel.
Before you spend on a twin disc, rule out the hydraulics. Check the fluid level and color in the clutch reservoir, bleed the system, and watch whether the pedal returns fully. A clutch that slips only after a hot session may be contaminated with oil from a rear main seal, which a new clutch will not fix until the leak is repaired. A useful test is to hold a steady speed in fourth or fifth gear, roll into the throttle and watch the tachometer: if RPM climbs faster than road speed, the disc is slipping. Our transmission slipping diagnosis guide walks through separating clutch slip from other drivetrain problems, and the manual vs automatic repair cost breakdown helps you budget the labor.
This listing covers the 2012-2017 Dodge Challenger with the 5.7L or 6.4L HEMI and the six-speed manual. McLeod's own application note for 6344907M also mentions 2009-2010 and later model years, but it skips 2011. The 2011 cars take a different input spline, and McLeod sells a separate 1-1/8 x 10 spline version for them, listed here as the McLeod 2011 Challenger kit 6344904. Automatic cars, V6 cars and the supercharged 6.2L Hellcat are not covered by this part number. Count the input shaft splines if the transmission has been swapped, and if you are unsure, send us the year and VIN before ordering so we can confirm the match. Need more holding power for a boosted build? Compare the McLeod RXT HD Challenger kit.
The kit arrives assembled with alignment marks on the pressure plate and floater, so keep the parts in the order they came out of the box. McLeod's instructions are specific: no thread locker on the pressure plate studs, flat washer then lock washer then nut, and tighten the pressure plate in a star pattern in two passes, 25 and then 35 ft-lb. Inspect the pilot bearing and replace it if it is rough or nicked; a slide hammer pilot bearing puller makes that easy with the transmission out. McLeod also recommends replacing the hydraulic slave cylinder while everything is apart, since it is the same labor. Use a clutch alignment tool to center the discs if you ever separate them. Bleed the clutch hydraulics with fresh brake fluid of the type specified for your car. Break-in matters: about 1200 normal clutch cycles of street driving, with traction control off, and never on a chassis dyno.
| Brand | McLeod Racing |
| Part number | 6344907M |
| Fits | McLeod RXT Twin Disc Clutch Kit 12-17 Challenger 1-1/8 x 26 Spline 0 BAL w/130T 8 Bolt AL Flywheel |
| Vehicle fitment | Dodge Challenger (2012-2017) |
| Type | Clutch Kits - Multi |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. McLeod leaves 2011 out of this part number because those cars use a different input spline. The 2011 version is McLeod 6344904 with a 1-1/8 x 10 spline. Send us your VIN if you are not sure which you have.
Yes. 6344907M is a complete unit: the RXT twin disc clutch on a dedicated 8-bolt billet aluminum flywheel with a 130-tooth ring gear and 0 balance, so you do not need to buy a separate flywheel.
McLeod rates the RXT twin disc at about 1000 horsepower and describes the pedal feel as close to stock. It is designed for street and strip use, but the lighter aluminum flywheel means you will need a little more throttle on takeoff than with the factory flywheel.
Replace the pilot bearing if it shows any wear and replace the hydraulic slave cylinder while the transmission is out, which McLeod recommends. Fix any rear main seal or input seal leak first, because oil on the discs will make any clutch slip.
McLeod calls for about 1200 clutch cycles of normal street driving, shifting up and down through the gears with traction control off. Do not break it in on a chassis dyno and avoid hard launches until the break-in is done.
